1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
|
/*
* Copyright (C) 2017 Oracle. All Rights Reserved.
*
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_defer.h"
#include "xfs_btree.h"
#include "xfs_bit.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_inode.h"
#include "xfs_inode_fork.h"
#include "xfs_alloc.h"
#include "xfs_bmap.h"
#include "xfs_quota.h"
#include "xfs_qm.h"
#include "xfs_dquot.h"
#include "xfs_dquot_item.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/trace.h"
/* Convert a scrub type code to a DQ flag, or return 0 if error. */
static inline uint
xfs_scrub_quota_to_dqtype(
struct xfs_scrub_context *sc)
{
switch (sc->sm->sm_type) {
case XFS_SCRUB_TYPE_UQUOTA:
return XFS_DQ_USER;
case XFS_SCRUB_TYPE_GQUOTA:
return XFS_DQ_GROUP;
case XFS_SCRUB_TYPE_PQUOTA:
return XFS_DQ_PROJ;
default:
return 0;
}
}
/* Set us up to scrub a quota. */
int
xfs_scrub_setup_quota(
struct xfs_scrub_context *sc,
struct xfs_inode *ip)
{
uint dqtype;
/*
* If userspace gave us an AG number or inode data, they don't
* know what they're doing. Get out.
*/
if (sc->sm->sm_agno || sc->sm->sm_ino || sc->sm->sm_gen)
return -EINVAL;
dqtype = xfs_scrub_quota_to_dqtype(sc);
if (dqtype == 0)
return -EINVAL;
if (!xfs_this_quota_on(sc->mp, dqtype))
return -ENOENT;
return 0;
}
/* Quotas. */
/* Scrub the fields in an individual quota item. */
STATIC void
xfs_scrub_quota_item(
struct xfs_scrub_context *sc,
uint dqtype,
struct xfs_dquot *dq,
xfs_dqid_t id)
{
struct xfs_mount *mp = sc->mp;
struct xfs_disk_dquot *d = &dq->q_core;
struct xfs_quotainfo *qi = mp->m_quotainfo;
xfs_fileoff_t offset;
unsigned long long bsoft;
unsigned long long isoft;
unsigned long long rsoft;
unsigned long long bhard;
unsigned long long ihard;
unsigned long long rhard;
unsigned long long bcount;
unsigned long long icount;
unsigned long long rcount;
xfs_ino_t fs_icount;
offset = id * qi->qi_dqperchunk;
/*
* We fed $id and DQNEXT into the xfs_qm_dqget call, which means
* that the actual dquot we got must either have the same id or
* the next higher id.
*/
if (id > be32_to_cpu(d->d_id))
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
/* Did we get the dquot type we wanted? */
if (dqtype != (d->d_flags & XFS_DQ_ALLTYPES))
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
if (d->d_pad0 != cpu_to_be32(0) || d->d_pad != cpu_to_be16(0))
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
/* Check the limits. */
bhard = be64_to_cpu(d->d_blk_hardlimit);
ihard = be64_to_cpu(d->d_ino_hardlimit);
rhard = be64_to_cpu(d->d_rtb_hardlimit);
bsoft = be64_to_cpu(d->d_blk_softlimit);
isoft = be64_to_cpu(d->d_ino_softlimit);
rsoft = be64_to_cpu(d->d_rtb_softlimit);
/*
* Warn if the hard limits are larger than the fs.
* Administrators can do this, though in production this seems
* suspect, which is why we flag it for review.
*
* Complain about corruption if the soft limit is greater than
* the hard limit.
*/
if (bhard > mp->m_sb.sb_dblocks)
xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (bsoft > bhard)
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
if (ihard > mp->m_maxicount)
xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (isoft > ihard)
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
if (rhard > mp->m_sb.sb_rblocks)
xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (rsoft > rhard)
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
/* Check the resource counts. */
bcount = be64_to_cpu(d->d_bcount);
icount = be64_to_cpu(d->d_icount);
rcount = be64_to_cpu(d->d_rtbcount);
fs_icount = percpu_counter_sum(&mp->m_icount);
/*
* Check that usage doesn't exceed physical limits. However, on
* a reflink filesystem we're allowed to exceed physical space
* if there are no quota limits.
*/
if (xfs_sb_version_hasreflink(&mp->m_sb)) {
if (mp->m_sb.sb_dblocks < bcount)
xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK,
offset);
} else {
if (mp->m_sb.sb_dblocks < bcount)
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK,
offset);
}
if (icount > fs_icount || rcount > mp->m_sb.sb_rblocks)
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
/*
* We can violate the hard limits if the admin suddenly sets a
* lower limit than the actual usage. However, we flag it for
* admin review.
*/
if (id != 0 && bhard != 0 && bcount > bhard)
xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (id != 0 && ihard != 0 && icount > ihard)
xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (id != 0 && rhard != 0 && rcount > rhard)
xfs_scrub_fblock_set_warning(sc, XFS_DATA_FORK, offset);
}
/* Scrub all of a quota type's items. */
int
xfs_scrub_quota(
struct xfs_scrub_context *sc)
{
struct xfs_bmbt_irec irec = { 0 };
struct xfs_mount *mp = sc->mp;
struct xfs_inode *ip;
struct xfs_quotainfo *qi = mp->m_quotainfo;
struct xfs_dquot *dq;
xfs_fileoff_t max_dqid_off;
xfs_fileoff_t off = 0;
xfs_dqid_t id = 0;
uint dqtype;
int nimaps;
int error;
if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
return -ENOENT;
mutex_lock(&qi->qi_quotaofflock);
dqtype = xfs_scrub_quota_to_dqtype(sc);
if (!xfs_this_quota_on(sc->mp, dqtype)) {
error = -ENOENT;
goto out_unlock_quota;
}
/* Attach to the quota inode and set sc->ip so that reporting works. */
ip = xfs_quota_inode(sc->mp, dqtype);
sc->ip = ip;
/* Look for problem extents. */
xfs_ilock(ip, XFS_ILOCK_EXCL);
if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) {
xfs_scrub_ino_set_corrupt(sc, sc->ip->i_ino, NULL);
goto out_unlock_inode;
}
max_dqid_off = ((xfs_dqid_t)-1) / qi->qi_dqperchunk;
while (1) {
if (xfs_scrub_should_terminate(sc, &error))
break;
off = irec.br_startoff + irec.br_blockcount;
nimaps = 1;
error = xfs_bmapi_read(ip, off, -1, &irec, &nimaps,
XFS_BMAPI_ENTIRE);
if (!xfs_scrub_fblock_process_error(sc, XFS_DATA_FORK, off,
&error))
goto out_unlock_inode;
if (!nimaps)
break;
if (irec.br_startblock == HOLESTARTBLOCK)
continue;
/* Check the extent record doesn't point to crap. */
if (irec.br_startblock + irec.br_blockcount <=
irec.br_startblock)
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK,
irec.br_startoff);
if (!xfs_verify_fsbno(mp, irec.br_startblock) ||
!xfs_verify_fsbno(mp, irec.br_startblock +
irec.br_blockcount - 1))
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK,
irec.br_startoff);
/*
* Unwritten extents or blocks mapped above the highest
* quota id shouldn't happen.
*/
if (isnullstartblock(irec.br_startblock) ||
irec.br_startoff > max_dqid_off ||
irec.br_startoff + irec.br_blockcount > max_dqid_off + 1)
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, off);
}
xfs_iunlock(ip, XFS_ILOCK_EXCL);
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
goto out;
/* Check all the quota items. */
while (id < ((xfs_dqid_t)-1ULL)) {
if (xfs_scrub_should_terminate(sc, &error))
break;
error = xfs_qm_dqget(mp, NULL, id, dqtype, XFS_QMOPT_DQNEXT,
&dq);
if (error == -ENOENT)
break;
if (!xfs_scrub_fblock_process_error(sc, XFS_DATA_FORK,
id * qi->qi_dqperchunk, &error))
break;
xfs_scrub_quota_item(sc, dqtype, dq, id);
id = be32_to_cpu(dq->q_core.d_id) + 1;
xfs_qm_dqput(dq);
if (!id)
break;
}
out:
/* We set sc->ip earlier, so make sure we clear it now. */
sc->ip = NULL;
out_unlock_quota:
mutex_unlock(&qi->qi_quotaofflock);
return error;
out_unlock_inode:
xfs_iunlock(ip, XFS_ILOCK_EXCL);
goto out;
}
|
